Final answer:
Two coplanar lines that intersect at a 90-degree angle are referred to as perpendicular lines, such as in the corner of a room or in the construction of squares and rectangles. This is distinctly different from parallel, skew, or tangent lines. b. perpendicular
Step-by-step explanation:
Two coplanar lines that intersect at a 90-degree angle are called perpendicular lines. The correct answer to the question is option b. perpendicular. Two lines are said to be perpendicular to each other if they meet or cross to form a right angle or 90 degrees. In contrast, parallel lines never intersect and maintain a consistent distance from each other. Skew lines are non-coplanar; they do not lie on the same plane and do not intersect. Tangent lines are straight lines that touch a curve at exactly one point without crossing through it.
Examples of perpendicular lines can be found in coordinate grids and in the construction of squares and rectangles. Additionally, when you observe the corner of a room where two walls meet, you are looking at perpendicular lines. Remembering these examples can help visualize the concept of lines being perpendicular to each other.